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1da177e4 LT |
1 | /** |
2 | * @file init.c | |
3 | * | |
4 | * @remark Copyright 2002 OProfile authors | |
5 | * @remark Read the file COPYING | |
6 | * | |
7 | * @author John Levon <levon@movementarian.org> | |
8 | */ | |
9 | ||
10 | #include <linux/oprofile.h> | |
11 | #include <linux/init.h> | |
12 | #include <linux/errno.h> | |
d717ca84 PC |
13 | |
14 | /* | |
15 | * We support CPUs that have performance counters like the Pentium Pro | |
1da177e4 LT |
16 | * with the NMI mode driver. |
17 | */ | |
d717ca84 PC |
18 | |
19 | extern int op_nmi_init(struct oprofile_operations *ops); | |
20 | extern int op_nmi_timer_init(struct oprofile_operations *ops); | |
96d0821c | 21 | extern void op_nmi_exit(void); |
1da177e4 LT |
22 | extern void x86_backtrace(struct pt_regs * const regs, unsigned int depth); |
23 | ||
24 | ||
d717ca84 | 25 | int __init oprofile_arch_init(struct oprofile_operations *ops) |
1da177e4 LT |
26 | { |
27 | int ret; | |
28 | ||
29 | ret = -ENODEV; | |
30 | ||
31 | #ifdef CONFIG_X86_LOCAL_APIC | |
96d0821c | 32 | ret = op_nmi_init(ops); |
1da177e4 LT |
33 | #endif |
34 | #ifdef CONFIG_X86_IO_APIC | |
35 | if (ret < 0) | |
96d0821c | 36 | ret = op_nmi_timer_init(ops); |
1da177e4 LT |
37 | #endif |
38 | ops->backtrace = x86_backtrace; | |
39 | ||
40 | return ret; | |
41 | } | |
42 | ||
43 | ||
44 | void oprofile_arch_exit(void) | |
45 | { | |
46 | #ifdef CONFIG_X86_LOCAL_APIC | |
96d0821c | 47 | op_nmi_exit(); |
1da177e4 LT |
48 | #endif |
49 | } |